package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;
import java.util.Objects;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    @Transactional //事务注解
    public void newAddWithFlavor(DishDTO dishDTO) {
        //向菜品表插入一条数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.newAdd(dish);

        Long id = dish.getId();//获取菜品id
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()!=0){
            //向口味表插入n条数据
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(id);
            });//设置口味表的id
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.query(dishPageQueryDTO);
        long total = page.getTotal();
        List<DishVO> result = page.getResult();
        return new PageResult(total,result);
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //是否存在起售中的的菜品
        for (Long id:ids){
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds!=null&&setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//        //删除菜品表中的数据
//        for (Long id:ids){
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishid(id);
//        }

        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);

    }

    @Override
    public DishVO seeByIdWithFlavor(Long id) {
        //根据id查询菜品数量
        Dish dish = dishMapper.getById(id);
        //查询口味数据
        List<DishFlavor> dishFlavors=dishFlavorMapper.getByDishId(id);
        //封装
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void updateWithFalvor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.updateDish(dish);

        dishFlavorMapper.deleteByDishid(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null&& !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishlist=dishMapper.list(dish);
        List<DishVO> dishVOList=new ArrayList<>();
        for(Dish d:dishlist){
            DishVO dishVO=new DishVO();
            BeanUtils.copyProperties(d,dishVO);
            //根据菜品id 查询对应的口味
            List<DishFlavor> flavors=dishFlavorMapper.getByDishId(d.getId());
            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }
        return dishVOList;
    }

    @Override
    @Transactional
    public void startOrStop(Integer status, Long id) {
        Dish dish=Dish.builder().status(status).id(id).build();
        dishMapper.updateDish(dish);
        if(Objects.equals(status, StatusConstant.DISABLE)){
            //如果是停售，还需要将当前关联的套餐也停售
            List<Long> dishIds=new ArrayList<>();
            dishIds.add(id);
            List<Long> setmealIds=setmealDishMapper.getSetmealIdsByDishIds(dishIds);
            if(setmealIds!=null&& !setmealIds.isEmpty()){
                for(Long setmealid:setmealIds){
                    Setmeal setmeal = Setmeal.builder().id(setmealid).status(StatusConstant.DISABLE).build();
                    setmealMapper.update(setmeal);
                }
            }
        }
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        return dishMapper.list(dish);
    }
}
